Pair or link up the CLI and Developer App. assuming Cordova 4+. Make sure your device and development machine are connected to same network and your firewall is not blocking any external connection. In my case both are connected to the same wifi network.

$ cordova serve

Open the Phonegap Developer app on your device. Click that box in the center with the IP address, and enter the IP address you see in your console.
In my case, it is 192.168.1.250:3000, see(the port 3000) so you’d enter that full number in the developer app, and press connect.

That is it! Now you can edit your project files as needed, and when you save you will see your changes in real time on your device.

Why you should go for PhoneGap development?

Boost your ROI. Different app operating systems and app stores mean more marketing outlets which are desirable. Apps developed using PhoneGap are high on functionality and are user friendly. Great quality app and versatile usage increases its viability and return of investment.